Seattle-Tacoma International ⇄ Ronald Reagan Washington Ntl SEA–DCA
Airlines flew 2,137 flights between Seattle-Tacoma International SEA in Seattle, WA and Ronald Reagan Washington Ntl DCA in Washington, DC in the twelve months to July 2026, both directions together: 293,371 passengers in 352,407 seats, 83% of them filled, and 93,094 pounds of freight. 2,329 miles, about 265 minutes in the air, on 2 airlines: Alaska Airlines Inc. (1,429), Delta Air Lines Inc. (708). Planning to fly it yourself? The weather and winds along this route right now.
Flights by month both directions
By month, as a table
| flights | |
|---|---|
| 1/25 | 116 |
| 2/25 | 103 |
| 3/25 | 168 |
| 4/25 | 180 |
| 5/25 | 184 |
| 6/25 | 177 |
| 7/25 | 172 |
| 8/25 | 181 |
| 9/25 | 179 |
| 10/25 | 186 |
| 11/25 | 174 |
| 12/25 | 181 |
| 1/26 | 176 |
| 2/26 | 166 |
| 3/26 | 175 |
| 4/26 | 180 |
| 5/26 | 186 |
| 6/26 | 177 |
| 7/26 | 176 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 15,957 |
| 2/25 | 14,033 |
| 3/25 | 24,139 |
| 4/25 | 25,775 |
| 5/25 | 26,546 |
| 6/25 | 26,303 |
| 7/25 | 25,404 |
| 8/25 | 27,164 |
| 9/25 | 23,767 |
| 10/25 | 24,345 |
| 11/25 | 22,543 |
| 12/25 | 24,837 |
| 1/26 | 21,798 |
| 2/26 | 20,869 |
| 3/26 | 24,633 |
| 4/26 | 25,263 |
| 5/26 | 26,868 |
| 6/26 | 25,506 |
| 7/26 | 25,778 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| Alaska Airlines Inc. AS | 1,429 | 203,560 | 89% | scheduled passenger service |
| Delta Air Lines Inc. DL | 708 | 89,811 | 73% | scheduled passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Boeing 737-800 | 1,200 | 160 | 170,753 |
| Boeing 757-200 | 522 | 168 | 63,225 |
| Boeing B737 Max 800 | 234 | 160 | 33,248 |
| Airbus Industrie A321-200n | 180 | 194 | 26,019 |
| Boeing B737 Max 900 | 1 | 178 | 126 |
SEA → DCA this direction alone · flown January 2025 to July 2026
1,066 flights of 1,099 scheduled, 148,330 passengers in 175,788 seats, 62,129 pounds of freight. Alaska Airlines Inc. 712; Delta Air Lines Inc. 354.
DCA → SEA this direction alone · flown January 2025 to July 2026
1,071 flights of 1,106 scheduled, 145,041 passengers in 176,619 seats, 30,965 pounds of freight, 49 pounds of mail. Alaska Airlines Inc. 717; Delta Air Lines Inc. 354.
Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: Seattle-Tacoma International SEA and Ronald Reagan Washington Ntl DCA; all routes.